chore: biome, deps, other housekeeping

[kanadgupta]

🧰 Changes

• swaps out eslint for biome
• updates our tsconfig to reflect typescript@5.9
• dependabot.yml cleanup
• updates our deps (see below)

before:

Package                Current   Wanted   Latest  Location                            Depended by
@readme/eslint-config   14.7.2   14.7.3   14.7.3  node_modules/@readme/eslint-config  rdme-plugin-template
@types/node             24.0.8   24.3.0   24.3.0  node_modules/@types/node            rdme-plugin-template
eslint                  8.57.1   8.57.1   9.34.0  node_modules/eslint                 rdme-plugin-template
knip                    5.61.3   5.63.0   5.63.0  node_modules/knip                   rdme-plugin-template
oclif                   4.20.1  4.22.14  4.22.14  node_modules/oclif                  rdme-plugin-template
tsx                     4.20.3   4.20.5   4.20.5  node_modules/tsx                    rdme-plugin-template
typescript               5.8.3    5.9.2    5.9.2  node_modules/typescript             rdme-plugin-template

after:

🧬 QA & Testing

does everything work as expected?

[kanadgupta]

this can be inferred from the module value: microsoft/TypeScript#61805